John Menoni not every movies got Dolby Digital Plus or True HD look at back cover on of disk.
This is might help you http://www.dts.com/dts-hd/dts-on-bluray-and-hddvd.php I got panasonic DMP-BD10 990/7125 I play Xmen and AVP they both(DTS-HD Master Audio)sound dinamic is incredible the best I ever heard.